Package com.hp.hpl.jena.sparql.expr

Examples of com.hp.hpl.jena.sparql.expr.ExprVar

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        // ---- Build expression
        bp.add(new Triple(var_x, Node.createURI(BASE+"p"), var_z)) ;
        Op op = new OpBGP(bp) ;
        //Expr expr = ExprUtils.parse("?z < 2 ") ;
        Expr expr = new E_LessThan(new ExprVar(var_z), NodeValue.makeNodeInteger(2)) ;
        op = OpFilter.filter(expr, op) ;

        // ---- Example setup
        Model m = makeModel() ;
        m.write(System.out, "TTL") ;
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        Triple t1 = new Triple(varX, DC.title.asNode(),  varTitle) ;
        elg.addTriplePattern(t1) ;
       
        // Adds a filter.  Need to wrap variable in a NodeVar.
        Expr expr = new E_Regex(new ExprVar(varTitle), "sparql", "i") ;
        ElementFilter filter = new  ElementFilter(expr) ;
        elg.addElementFilter(filter) ;
       
        // Attach the group to query. 
        query.setQueryPattern(elg) ;
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{
    public static Expr nodeToExpr(Node n)
    {
        if ( n.isVariable() )
            return new ExprVar(n) ;
        return NodeValue.makeNode(n) ;
    }
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    }
   
    public void addOrderBy(String varName, int direction)
    {
        varName = Var.canonical(varName) ;
        SortCondition sc = new SortCondition(new ExprVar(varName), direction) ;
        addOrderBy(sc) ;
    }
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                // which are ways of accessing the names in the dataset.
                return new OpDatasetNames(opGraph.getNode()) ;
            }
           
            if ( actualName != rewriteName )
                op = OpAssign.assign(op, Var.alloc(actualName), new ExprVar(rewriteName)) ;

            // Drop (graph...) because inside nodes
            // have been converted to quads.
            return op ;
        }
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{
    public Expr expression = null ;
    public int direction = 0 ;

    public SortCondition(Var var, int dir)
    { this(new ExprVar(var),dir) ; }
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        BasicPattern bp = new BasicPattern() ;
        Triple t = new Triple(nodeVar, RDFS.label.asNode(), var2) ;
        bp.add(t) ;
        OpBGP op = new OpBGP(bp) ;
       
        Expr regex = new E_Regex(new ExprVar(var2.getName()), pattern, "i") ;
        Op filter = OpFilter.filter(regex, op) ;

        // ---- Evaluation
        if ( true )
        {
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        ElementTriplesBlock elementBGP = new ElementTriplesBlock();
        Triple t = new Triple(nodeVar, RDFS.label.asNode(), var2) ;
        elementBGP.addTriple(t) ;
       
        // Regular expression for  regex(?hiddenVar, "pattern", "i")
        Expr regex = new E_Regex(new ExprVar(var2.getName()), pattern, "i") ;
       
        ElementGroup elementGroup = new ElementGroup() ;
        elementGroup.addElement(elementBGP) ;
        elementGroup.addElement(new ElementFilter(regex)) ;
        // Compile it.
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    private void testSorting(int numBindings, int threshold)
    {
        List<Binding> unsorted = randomBindings(numBindings);
       
        List<SortCondition> conditions = new ArrayList<SortCondition>();
        conditions.add(new SortCondition(new ExprVar("8"), Query.ORDER_ASCENDING));
        conditions.add(new SortCondition(new ExprVar("1"), Query.ORDER_ASCENDING));
        conditions.add(new SortCondition(new ExprVar("0"), Query.ORDER_DESCENDING));
        BindingComparator comparator = new BindingComparator(conditions);

        List<Binding> sorted = new ArrayList<Binding>();
       
        SortedDataBag<Binding> db = new SortedDataBag<Binding>(
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    @Test public void testTemporaryFilesAreCleanedUpAfterCompletion()
    {
        List<Binding> unsorted = randomBindings(500);
       
        List<SortCondition> conditions = new ArrayList<SortCondition>();
        conditions.add(new SortCondition(new ExprVar("8"), Query.ORDER_ASCENDING));
        BindingComparator comparator = new BindingComparator(conditions);
       
        SortedDataBag<Binding> db = new SortedDataBag<Binding>(
                new ThresholdPolicyCount<Binding>(10),
                SerializationFactoryFinder.bindingSerializationFactory(),
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Related Classes of com.hp.hpl.jena.sparql.expr.ExprVar

  • arq.examples.AlgebraExec
  • arq.examples.ExProg2
  • arq.examples.propertyfunction.labelSearch
  • com.hp.hpl.jena.graph.Node
  • com.hp.hpl.jena.query.Query
  • com.hp.hpl.jena.query.SortCondition
  • com.hp.hpl.jena.sparql.algebra.AlgebraQuad$TransformQuadGraph
  • com.hp.hpl.jena.sparql.algebra.optimize.TestOptimizer
  • com.hp.hpl.jena.sparql.core.Var
  • com.hp.hpl.jena.sparql.engine.iterator.TestQueryIterSort
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